A numerical study of flow and thermal fields in finned tube heat exchangers (Effect of the tube diameter)
- Daikin Industries, Ltd., Sakai, Osaka (Japan). Mechanical Engineering Lab.
Enhancement of air-side heat transfer in heat exchangers used in air-conditioning machines can be considered as a way to solve the problem caused by use of alternative refrigerants. Related with this, the present study aims to investigate the flow and thermal fields in finned tube heat exchangers. In previous papers (Torikoshi et al., 1994 and Xi et al., 1994, 1995), numerical schemes that used a compound grid system for finned tube heat exchangers were described. The schemes were validated with experimental data. In the present paper, a three-dimensional unsteady numerical computation for a model of a two-row finned tube heat exchanger located in a uniform flow field has been performed to see the effect of tube diameter on the flow and thermal fields. Several features were found in the study. One interesting finding was that increasing the tube diameter almost does not improve heat transfer performance but increases the resistance of the fluid flow inside the heat exchanger.
- OSTI ID:
- 458436
- Report Number(s):
- CONF-951135-; ISBN 0-7918-1751-2; TRN: IM9717%%222
- Resource Relation:
- Conference: 1995 International mechanical engineering congress and exhibition, San Francisco, CA (United States), 12-17 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the ASME Heat Transfer Division. Volume 1: Benchmark problems of heat transfer analysis programs; High heat flux thermal management; Modeling of heat transfer in multi-phase systems; Natural and mixed convection; Numerical methods in heat exchanger design; HTD-Volume 317-1; Cochran, R.J.; Hogan, R.E. [eds.] [Sandia National Lab., Albuquerque, NM (United States). Engineering Sciences Center]; Khounsary, A.M. [ed.] [Argonne National Lab., IL (United States)] [and others]; PB: 484 p.
- Country of Publication:
- United States
- Language:
- English
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